Decision analysis software since 2007

Decision analysis, without the complexity.

Three product lines for rigorous decision-makers: Analytic Hierarchy Process, Decision Tree Pro, and the Rational Will® bundle. No cloud dependency, no monthly fees, and every formula is one click from its citation.

Real product screens: AHP Software and Rational Will®

150+ published academic papers cite SpiceLogic software - and counting
19 years of continuous development, since 2007
Perpetual license - pay once, own it, no renewals ever
Trusted by decision-makers at
Shell U.S. Navy U.S. Army Samsung Intel Siemens
Product suite

Three product lines. One discipline.

Each tool is a complete implementation of a normative decision-theory method. Standalone, or bundled in Rational Will®.

Audiences

Built for serious decision-makers.

Four groups use SpiceLogic software for different decisions - the same methods, different reporting needs.

Health economists & HTA analysts

Submissions to NICE, CADTH and PBAC.

Build cost-effectiveness models with QALY and DALY payoffs and Markov cohorts. Export reports that meet the method requirements of each agency.

See Decision Tree Pro →
Defense, energy & government procurement

Multi-criteria evaluation, with a clear audit trail.

Score suppliers, sites, or platforms on weighted criteria. Reach group consensus through AIJ and AIP aggregation without any cloud dependency.

See AHP Software →
Academic researchers & PhD students

Cited in peer-reviewed journals worldwide.

Discounted academic licenses, models that can be reproduced, and a citation index that shows prior use of each method in published research.

Academic citation program →
Enterprise strategy & operations

Capital allocation and supplier selection.

Measure portfolio decisions with stochastic dominance and real-options frameworks. Outputs are structured for board and investment committee review.

See Rational Will →
Why SpiceLogic

Built by the engineers who designed the methods.

Actively developed since 2007. Every model exports audit-ready PDF and Excel reports with full traceability - every probability, weight, and assumption is captured, so your analysis stands up months later.

Own your license. No subscription.

  • One-time purchase, yours to keep. Pay once and use the version you bought forever.
  • No monthly fees. No auto-renewal. No price changes forced on you.
  • Works offline. No cloud account required. Your data stays on your machine.
Cited in the literature

Used in 150+ academic publications worldwide.

SpiceLogic tools appear in published research across health technology assessment, supply chain management, sustainability, energy, and public-policy decision analysis - in journals indexed by Springer, IEEE, Elsevier, and Facta Universitatis, among others.

View the full citation index →
For .NET developers

Component libraries for WPF, WinForms and ASP.NET.

Drop-in controls for .NET desktop and web applications. Available on NuGet - add HTML editing or PayPal checkout to your app in minutes.

WPF · .NET control

WPF HTML Editor Control

Reliable WPF HTML editor control for .NET apps - preserve HTML, paste from Word safely, customize toolbar, and ship faster. Download the trial.

Install-Package SpiceLogic.HtmlEditor.WPF
WinForms · .NET control

.NET WinForms HTML Editor Control

Drop-in WYSIWYG HTML editor for C# and VB.NET WinForms apps. NuGet install, .NET 4.5 to .NET 10, spell check, mail merge, source code.

Install-Package SpiceLogic.HtmlEditor.WinForms
ASP.NET · .NET control

Asp.Net PayPal Control

SpieLogic Asp.Net PayPal Control that encapsulates the PayPal Website Payments Standard. SDK for Creating PayPal buttons and Capturing IPN/PDT.

See documentation

Talk to the engineers, not a chatbot.

Your questions are answered by the engineering team behind the software - in a live Zoom or Teams session, or by email within one business day. Bring a real decision and we will help you model it.

No NDA · no sales script · free to evaluators.